var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var rightsRouter = require('./routes/right');
var rolesRouter = require('./routes/role');
var usersRouter = require('./routes/user');
var tagsRouter = require('./routes/tag');
var classesRouter = require('./routes/class');
var studentsRouter = require('./routes/student');
var companysRouter = require('./routes/company');
var employmentsRouter = require('./routes/employment');
const JWT = require('./util/JWT');

var app = express();

// 后端路由拦截
app.use((req, resp, next) => {
  // 放行登录和前端路由
  if (req.url === '/adminapi/users/login' || req.url === '/adminapi/students/login' || !req.url.includes('/adminapi')) {
    next()
    return
  }
  const token = req.headers['authorization']?.split(' ')[1]
  if (token) {
    let payload = JWT.verify(token)
    if (payload) {
      const newToken = JWT.generate({
        _id: payload._id,
        username: payload.username,
        role: payload.role
      }, '1800s')
      resp.header('Authorization', newToken)
      next()
    } else {
      resp.status(401).send({ error: -1, errorInfo: 'token过期' })
    }
  } else {
    resp.status(401).send({ error: -2, errorInfo: '未授权' })
  }
})

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use(rightsRouter);
app.use(rolesRouter);
app.use(usersRouter);
app.use(tagsRouter);
app.use(classesRouter);
app.use(studentsRouter);
app.use(companysRouter);
app.use(employmentsRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
